The role of butylbenzene carbenium ions in acid catalyzed cracking of polystyrene. Transformation of n-butylbenzene, sec-butylbenzene, iso-butylbenzene, tert-butylbenzene, 4-phenyl-1-butene, n-propylbenzene and n-hexylbenzene over silicaalumina and alumina acid catalysts

Marek Marczewski , Magdalena Kominiak , Magdalena Dul , Hanna Marczewska

Abstract

The obtained results show that styrene dimers, which are the primary transition products of PS cracking undergo consecutive reactions over acid centers of high acid strength (SiO2–Al2O3(45 %); −10.8 < HO ≤ −7.9) as well as centers of low acid strength (γ-Al2O3; HO > −3.3) at sufficiently high reaction temperatures (723–773 K). It is proposed that phenylbutenyl carbenium ion obtained due to dealkylation reaction converts into coke by the successive elimination of H+ and H− ions, which in turn take part in hydrogen transfer reactions resulting in the hydrogenation of styrene dimers to diphenylbutane. The dealkylation of this compound leads to active γ-butylbenzene carbenium ion which is a key intermediate for the formation of indane and naphthalene derivatives.
Author Marek Marczewski KTCh
Marek Marczewski,,
- Chair of Chemical Technology
, Magdalena Kominiak KTCh
Magdalena Kominiak,,
- Chair of Chemical Technology
, Magdalena Dul KTCh
Magdalena Dul,,
- Chair of Chemical Technology
, Hanna Marczewska KTCh
Hanna Marczewska,,
- Chair of Chemical Technology
Journal seriesReaction Kinetics Mechanisms and Catalysis, ISSN 1878-5190
Issue year2016
Vol119
No1
Pages107-120
Publication size in sheets0.65
Keywords in Englishpolystyrene decomposition, butylbenzenes reactions, acid strength, silicaalumina, alumina
DOIDOI:10.1007/s11144-016-1050-5
URL http://link.springer.com/article/10.1007/s11144-016-1050-5
Languageen angielski
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Reac Kinet Mech Cat 119 (2016) 107-120.pdf (file archived - login or check accessibility on faculty) Reac Kinet Mech Cat 119 (2016) 107-120.pdf 670.22 KB
Score (nominal)15
ScoreMinisterial score = 15.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.264 (2) - 2016=1.143 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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